Wheel, pulley, and gear puller



Patented Apr. 29, 1930 CHARLES TILSSNER, OF OGLESBY, ILLINOIS WHEEL, PULLEY, AND GEAR FULLER Application filed April 29,

This invention relates to tools intended for use by automobile mechanics and others and has for its object the provision of a novel device by means of which a wheel, gear, pulley or the like may be removed from its shaft, spindle or axle.

An important object of the invention is to provide a puller of this character which is of the semi-hydraulic and semi-manual type, the arrangement and cooperation of the various pressure exerting means making it possible todevelop an unusually high pressure which is certain to effect removal of the machine element to be removed.

A more specific object of the invention is to provide a puller of this type embodying a combination of screw and hydraulic pressure means.

A more specific object of the invention is to provide .a puller of this type embodying a combination of screw and hydraulic pressure means for effecting actuation. 1

' Another object of the invention is to provide a device of this character having associated therewith different structural elements permitting its use in connection with the removal of wheels, or gears or pulleys from an axle, spindle or shaft.

Still another object is to provide a device of this character which is capable of employ ment as a jack for lifting purposes or wherever it is desired to apply an extremely high pressure against an article or element.

An additional object is to provide a device of this character which will be simple and inexpensive to manufacture, easy to assemble and use, positive in action, efficient and durable in service, and a general improvement in the art. 7

With the above and other objects and advantages in view, the invention preferably consists in the details of construction and the arrangement and combination of parts to be hereinafter more fully described and claimed,

1929. Serial No. 358,951.

and illustrated in the accompanying drawing in which Figure 1 is a vertical longitudinal section taken through the device showing it in use for pulling a wheel.

Figure 2 is a cross section taken on substan tially the line 22 of Figure 1.

Figure 3is a detail perspective view of the element adapted to be engaged upon the wheel hub.

Figure 4 is a detail perspective view of the element used in place of the member shown in Figure 3 when it is desired to pull a gear, pulley or the like.

Figure 5 is a side elevation of the device ing through a relatively small passage 13.

In alignment with the bore 12 the body is represented as formed with a groove 14 for a purpose to be described. Slidably mounted within the bore 12 is a piston 15 having, at its rear end, a packing washer 16 held in place as for example by means of a screw 17 or the like. It is of course obvious that any other packing meansmight be provided, the intention being to make a tight and liquid proof joint between the bore 12 and the piston 15 therein.

Located within the bore 11 is a screw 18 of slightly less diameter than the bore, which screw carries a piston 19 secured thereto in any desired manner as for example by means of the screw 20 or the like. The exact construction of the piston 19 is immaterial though it might in actual practice be very conveniently formed as a leather cup washer. The longer leg of the body, that is to say the leg in Which the bore 11 is formed has a reduced exteriorly threaded extension 21 thereon upon which is threadedly engaged a cap member 22 having a threaded bore 23 therein through which the screw 18 is threadedly engaged.

Beyond the cap 22 the screw 18 is provided with a head '24 which may have holes 25 therein for the insertion of a rod serving as a handle or which may terminate in an angular extending portion 26 adapted to be engaged by a wrench or the like. It is of course apparent that any suitable packing, 27 may be provided within the cap 22 for preventing any leakage about the screw 18.

The device further includes a transversely arranged yoke or bar 28' engaged within. the. groove 14 and formed with elongated slots 29 through which extend rods 30 carrying adjusting nuts 31 and extending through holes 32 in a transverse member 33 having a threaded opening 34 adapted to be screwed onto the hub A of the wheel B to be removed from a spindle or axle C. By providing the elongated slots 29 it is apparent that members 33 of different length and consequently different separations of the rods 30 may be employed. The member 28 may be held associated with the body of the device as by means of a screw 35.

Assuming that the device has been constructed as above described and assuming that the body has been formed with an oil filling hole 36 normally closed by a screw 37 or the like, the operation is as follows. The member 33 has its threaded opening 34 screwed onto the hub A. The operator then places the body 10 in such position that the outer end of the piston15 will engage against the reduced threaded extension D on the shaft or spindle C'.

The member 28 being in place, the bolts 30 are passed through the holes 32 in the member 33 and through the slots 29 in the member 28, subsequently to which the nuts 31 are screwed home as tightly as possible. The operator then engages a wrench upon the reduced angular extension 26 of the screw 18 or else inserts a rod or the like through the holes 25, or resorts to any other expedient to provide handle means for the screw 18, and then turns the screw 18 in a clockwise direction so as to move the piston 19 along the bore 11. It is intended that these bores 11 and 12 will be initially filled with oil which may be introduced through the hole or passage 36 upon removal of the screw 17, it being quite obvious that after such filling the screw 17 must be replaced. When the screw 18 is turned, it is then apparent that the oil or other liquid will be compressed and will pass through the passage-13- and exert a tremendous pressure against the inner end of the piston 15 so that this piston 15 will be forced outwardly. In View of the fact that the hub is securely anchored to the member 29 by means of the bolts or rods 30, it is apparent that when this pressure is brought to bear upon the end of the reduced threadedextension D of the shaft, axle or spindle, the hub A of the wheel 13 will be positively withdrawn from the spindle or axle C in a very simple and expeditious manner. 7

In case the device is to be used for pulling a gear, pulley or the like in lieu of a wheel having a threaded hub, use may be made of the member disclosed in Figure 4. This member comprises a plate 38 having holes 39 therein corresponding to the holes 32in the member 33 and also having a notch 40 which opens out to one edge. When the device is used in connection with this member-38 in stead of the member 33, it is of course apparent that the operation is identically the same 7 except that the member 38 is engaged about the axle or shaft behind the gear, pulley or the like, to be removed.

The device is also capable of employment where it is simply necessary to exert a great pressure against an element or where it. is desired to exert a lifting action. In Figure 5 I have disclosed the device constructed in the manner above described but, provided with a handle 10 by means of which it may be conveniently lifted about. If the device is to be used as a jack, it is apparent that the body is laid upon the ground or floor with that portion opposite the piston 15 engaging flat upon the surface, whereupon rotation of the screw 18 will operate to compress the liquid, such as oil or the like within the bores 11 and 12 and exert a lifting action upon the piston 15. i

From the foregoing description and a study of the drawing it will be apparent thatI have thus provided a very simply constructed and inexpensive device, by means of which wheels, pulleys, gears or other structural elements of a similar character may be readily and easily removed from the axles, spindles or shafts upon which they are mounted. No special training is necessary to operate the device and no tools other than possibly a wrench or some other handled structure. It is believed that the construction, operation and advantages will be readily apparent to one skilled in the art without further explanation.

l/Vhile I have shown and described the preferred embodiment of the invention, it should be understood that I reserve the right to make all such changes in the details of construction and the arrangement and combination of parts as will not depart from the spirit of the invention or the scope of the subjoined claim.

Having. thus described the invention I claim:

A puller of the character described comprising a substantially L-shaped body having its arms formed with bores communicating through arelatively small passage, a piston slidably mounted within one bore and adapted to engage against a shaft or axle from which an element is to be removed, a screw extending into the other bore and carrying a piston slidable therein, a cap threadedly engaged with the screw and engaging against the body, a member adapted to be engaged with the element to be removed from the shaft or spindle, a member disposed against the body substantially in alignment with the first named piston, and means connecting said first and second named members.

In testimony whereof I aflix my signature.

CHARLES TILSSNER. 

